Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
лебед
←
Proto-Indo-European
*h₂elbʰós
(derived)
←
Proto-Slavic
*elbedь
(inherited)
←
Proto-Slavic
*elbędь
(mention)